<template>
<div class="login_container">
 <div class="login_box">
     <!-- 头像区域 -->
     <div class="avatar_box">
         <img src="../assets/logo.png" alt="">
     </div>
     <!-- 登录表单区域 -->
     <el-form ref="loginFormRef" label-width="0px" class="login_from" :model="loginForm" :rules="loginFormRules">
         <!-- 用户名 -->
        <el-form-item prop="username">
            <el-input prefix-icon="iconfont icon-user" v-model="loginForm.username"></el-input>
        </el-form-item>
        <!-- 密码 -->
         <el-form-item prop="password">
            <el-input prefix-icon="iconfont icon-3702mima" v-model="loginForm.password" type="password"></el-input>
        </el-form-item>
         <el-form-item class="btns">
            <el-button type="primary" @click="login">登录</el-button>
             <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
     </el-form>
 </div>
</div>

</template>

<script>
import { async } from 'q';
export default{
    data(){
        return{
            loginForm: {
                username:'admin',
                password:'123456'
            },
            loginFormRules:{
                username:[ 
                    { required: true, message: '请输入登录名称', trigger: 'blur' },
                    { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                  ],
                password:[
                     { required: true, message: '请输入登录密码', trigger: 'blur' },
                     { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
                ]
            }
        }
    },methods:{
        resetLoginForm(){
            // console.log(this)
            this.$refs.loginFormRef.resetFields();
        },
        login(){
            this.$refs.loginFormRef.validate(async valid=>{
                // console.log(valid);
                if(!valid) return;
               const {data:res} =await this.$http.post('login',this.loginForm);
            //    console.log(res);
                if(res.meta.status!==200) return this.$message.error('登录失败');
                this.$message.success('登录成功');
                //将登陆成功后的token，保存到客户端的sessionStorage中
                window.sessionStorage.setItem('token',res.data.token);
                //通过编程式导航跳转到后台主页，路由地址是/home
                this.$router.push("/home");
            })
        }
    }
}
</script>

<style lang="less" scoped>
.login_container{
    background-color: #2b4b6b;
    height: 100%;
}
.login_box{
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
}
.avatar_box{
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%,-50%);
    background-color: #fff;
}
.avatar_box img{
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eee;
}
.login_from{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    // border-box 告诉浏览器：你想要设置的边框和内边距的值是包含在width内的
    box-sizing: border-box;
}
.btns{
    display: flex;
    // justify-content 用于设置或检索弹性盒子元素在主轴（横轴）方向上的对齐方式。flex-end尾部对齐
    justify-content: flex-end;
}


</style>